Analysis
- max time kernel
148s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
29/05/2024, 08:57
General
- Target 2024-05-29_c536a00fe37f5b08d04cdcdc4767d70e_cryptolocker.exe
- Size 39KB
- Sample240529-kwt7paaa99
- SHA256 c1237bd2abe071f38dfa84d0eb0026c987fc2caba8888e30a1b58352b8b6fa4a
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
- Detection of Cryptolocker Samples 5 IoCs
- UPX dump on OEP (original entry point) 5 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- UPX packed file 5 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-29_c536a00fe37f5b08d04cdcdc4767d70e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-29_c536a00fe37f5b08d04cdcdc4767d70e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
asih.exe
memory/548-19-0x0000000000500000-0x0000000000510000-memory.dmp
memory/548-21-0x00000000006C0000-0x00000000006C6000-memory.dmp
memory/548-27-0x00000000006A0000-0x00000000006A6000-memory.dmp
memory/548-28-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4468-0-0x0000000000500000-0x0000000000510000-memory.dmp
memory/4468-1-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4468-2-0x00000000004D0000-0x00000000004D6000-memory.dmp
memory/4468-3-0x00000000005E0000-0x00000000005E6000-memory.dmp
memory/4468-17-0x0000000000500000-0x0000000000510000-memory.dmp